Hexry mallebre



(No Model.) 1

H. MALLEBRE.

UPR-IGHT PIANO ACTION FRAME. No. 398,635. Patented Feb. 26, 1889.

WITNESSES. IIVVE/VTOR UNITED STATES HENRY MALLEBRFI,

PATENT OFFICE OF XEW YORK, N. Y.

UPRlGHT-PIANO ACTION=FRAME.

SPECIFICATION forming part of Letters Patent No. 398,635, dated February 26, 1889,

Application filed November 16, 1888, Serial No. 290,999. (No model.)

To all whom it 11mg concern.-

Be it known that I, HENRY MALLEBRE, of

the city, county, and State of New York, have I This invention relates to certain improve- 1 ments in action-frames for upright pianos,

whereby the key-bottom is prevented from sagging, so that changes in the relative positions of the parts of the actions are avoided, a more effective operation of the actions obtained, and the regulating of the same facilifated; and the invention consists of an upright-piano action-frame in which the standards of the frame are suspended from projecting brackets at the upper part of the string-frame, said projections being provided with sockets or recesses into which corresponding noses at the upper ends of the standards are seated. The lower ends of the standards are connected by screw-bolts with the key-bottom, and attached to shoulders and threaded shanks of said bolts by screw- 5 nuts, as will be fully described hereinafter, and finally be pointed out in the claims.

In the accompanying drawings, Figure 1 represents a side elevation, partly in section,

of my improved action-frame for upright pianos, showing the connect-ion of the frame with the stringframe and key-bottom; and Fig. 2 is a detail side view of one of the stand ards of the action-frame.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A are the standards of my improved upright-piano actionframe. poring nose, (1, to a projecting bracket, B, which is cast integral with the string-frame C of the upright piano, said bracket being provided with a tapering socket or recess, Z),

that corresponds to the shape of the nose at of the standard A. For the purpose of preventing the lifting out or detaching of the standard A from the projection B, the upper end of the same is-provided with a set-screw, d, that bears on the beveled front edge of the bracket B, and retains thereby the standard firmly in position on the same, as shown in Fig. 1.

To the standards A of the action-frame are mounted, in the usual manner, the difierent rails required for supporting the actions, as

Each standard A is hung by a tai customary in piano-action frames. Thelower 5 end, e, of each standard A is bent in forward direction and connected with the upper end of a screw-bolt, D, which is screwed into the key bottom F. The lower end, 8, of the standard A rests on a shoulder, e, at the upper end of the screw-bolt D, and is regages the threaded shank e of the screw bolt D. By the screw-bolt connection of the standards A with the key-bottom E the lowering or sagging of the same is prevented, so that the parts of the actions are retained in their proper relative positions. By the rigid connection of the string-frame and keybottom by the intermediate standards of the action-frame the actions are prevented from getting out of order, and can be regulated easily and in less time, and operated with great precision. By the tight fastening of the standards by the screw nuts on the threaded ends of the bolts the rigid position of the key-bottom, actionframc, and actions is obtained, and thereby the accurate and reliable working of the actions produced.

Having thus described my invention, I claim as n ew and desireto secure by Letters Patent- 1. In upright-piano action-frames, the combination of a string-frame having projecting brackets and recesses or sockets in said brackets, upright standards provided with beveled noses resting in said sockets, and screw-bolts connecting the lower ends of the standards with the key-bottom, substantially 1 as set forth.

2. In upright-piano action-frames, the combination, with a string-frame having projecting brackets provided with recesses or sock- Z ets, upright standards for the actions, said standards having beveled noses at the upper ends resting in said sockets, set screws pass ing through the upper ends of the standards and engaging the brackets, and screw-bolts connecting thelower ends of the standards 5 with the keybottom, said bolts having shoulders and threaded shanks for the fastening i screw-nuts, substantially as set forth.

In testimony that I claim the foregoing as my invention Ihave signed my name in pressi ence of two subscribing witnesses.

HENRY MALLEBRE. I TVitnesses: I PAUL GoEPEL,

CARL KARP.

taincd thereon by a screw-nut, D, which en- 

